201118 has 4 divisors (see below), whose sum is σ = 301680. Its totient is φ = 100558.

The previous prime is 201107. The next prime is 201119. The reversal of 201118 is 811102.

201118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 201098 and 201107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50278 + ... + 50281.

It is an arithmetic number, because the mean of its divisors is an integer number (75420).

2²⁰¹¹¹⁸ is an apocalyptic number.

201118 is a deficient number, since it is larger than the sum of its proper divisors (100562).

201118 is a wasteful number, since it uses less digits than its factorization.

201118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100561.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 201118 is about 448.4618155429. The cubic root of 201118 is about 58.5891207424.

Subtracting from 201118 its product of nonzero digits (16), we obtain a palindrome (201102).

The spelling of 201118 in words is "two hundred one thousand, one hundred eighteen".